不同生产方式DEM的坡度算法比较

Comparison of Slope Algorithms for DEM of Different Production Modes

在吉林省国土调查工作中,普遍利用DEM以ArcGIS为平台来计算坡度,对以不同方式生产的DEM均采用三阶反距离平方权差分算法计算坡度,并未顾及DEM生产方式的改进对坡度计算带来的影响。本文以不同生产方式生产的DEM为研究对象,在理论上分析不同坡度计算方法的适用性,并利用不同生产方式获取的DEM实验数据按不同算法分别计算坡度,对相关结论进行了验证,旨在为实际工作中依据DEM的特点确定适宜的坡度算法提供参考。

In the land survey of Jilin Province,DEM is generally used to calculate the slope based on ArcGIS platform,and the third-order inverse distance square weight difference algorithm is used to calculate the slope for DEM produced in different ways,without considering the impact of the improvement of DEM production mode on the slope calculation.In this paper,DEM produced by different modes of production is taken as the research object,the applicability of different slope calculation methods is analyzed theoretically,and the slope is calculated according to different algorithms by using DEM experimental data obtained by different modes of production,and the relevant conclusions are verified.The purpose of this paper is to provide reference for determining the appropriate slope algorithm according to the characteristics of DEM in practical work.